History Main / BackupTwin

* ''ComicBook/LuckyLuke'': The Daltons Brothers died in their starring comic. Then they introduced their cousins, Joe, William, Jack and Averell who quickly overshadowed their RealLife counterpart.

* In the LightNovel ''LightNovel/DanganronpaZero'' there are [[spoiler:the Madarai Brothers and they're actual octuplets.]]

When [[KilledOffForReal a beloved character is killed]] and the writers are serious about it, their only option for the sequel is to bring them back as their [[AssPull hitherto-unseen]] identical twin sibling.

Don't try this in RealLife. In fact this should probably go on the Evil Overlord List, because [[MagicGenetics that's not how genetics works guys]]. Real identical twins can be as different in personality as any other siblings: they just LOOK the same. While they might share some similar preferences (there's a great story told in a lot of parenting books about twin boys that loved cinnamon) or even say similar things: they are two completely different people. One could be straight, and the other gay: one could be a killer, and the other a committed pacifist. They could even eerily manifest personality traits of two very different ancestors leading them to become nemeses. This also applies to clones. Genetics are just the foundation of who we are: you can build two completely different houses on the same foundation.

* In ''TabletopGame/Paranoia'' you start off with five clones of your character. Since it's a world where everyone is out to get you (hence the name), you will need them.

Don't try this in RealLife. In fact this should probably go on the Evil Overlord List, because [[MagicGenetics that's not how genetics works guys]]. Real identical twins can be as different in personality as any other siblings: they just LOOK the same. While they might share some similar preferences (there's a great story told in a lot of parenting books about twin boys that loved cinnamon) or even say similar things: they are two completely different people. One could be straight, and the other gay: one could be a killer, and the other a committed pacifist. They could even eerily manifest personality traits of two very different ancestors leading them to become [[EnemyMine nemeses]]. This also applies to clones. Genetics are just the foundation of who we are: you can build two completely different houses on the same foundation.

* An out-of-universe variation happened in TabletopGame/StarFrontiers, where, following creator drama, one of the five playable races, the Sathar, was turned AlwaysChaoticEvil for the sake of having [[TheUsualAntagonists usual antagonists]]; the creators who had been removed from the project later reintroduced the original version as the S'sessu on the in-universe basis that they were [[AlienAbduction probably abducted and left on a different world by aliens]], and hence developed spacefaring civilisation independently of the main Sathar.

* Takashi Shirogane (Sven) was killed in the sixth episode of ''Anime/GoLion'' (but merely "wounded" in ''Anime/{{Voltron}}''), but when the audience demanded he be brought back, they did it in Japan by introducing his identical twin brother. (Since he wasn't actually dead in ''Voltron'', they just called him Sven and said he'd finally recovered.)
* Presea in ''Manga/MagicKnightRayearth'' was replaced by her twin sister Sierra thanks to SchrodingersCast--Presea only died in the anime adaptation, and the plot of Part II needed her. For extra points, Sierra is forced to pretend that she ''is'' Presea thanks to a lie Clef concocted about Emeraude resurrecting her with her last wish.
* Neil Dylandy a.k.a Lockon Stratos was killed by the end of ''Anime/MobileSuitGundam00'' but came back for the second season as his twin brother Lyle Dylandy a.k.a Lockon Stratos II. In this case [[ChekhovsGunman the twin's existence was revealed in a brief scene]] early in the series, and later on it veers into DeconstructedTrope. The first thing Lyle made sure to tell his teammates in Celestial Being is he's ''not'' his older twin Neil's ReplacementGoldfish, even preferring to put on a facade of a jerk rather than leading Feldt on, since she was in love with his deceased brother. He also prefers to use a different style of gun fighting to contrast Neil's sniping method, although he also uses it frequently. Basically, both twins are Lockon Stratos, but they are at the same time their very own persons with different views on life, love, and revenge.

* ''Franchise/SpiderMan'': Minor villain the Ox from the Enforcers got replaced by his never-before-seen twin brother after dying.
* In ''ComicBook/StarfiresRevenge'', the titular villain kills her minion Derek to make sure he cannot reveal her plans, and then she calls his twin brother Rodney to help her kill ComicBook/{{Supergirl}}.

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* In ''ComicStrip/DickTracy,'' after cute-but-evil villain Hot Rize died in her debut story arc, her never-before-seen identical twin Blaze Rize showed up looking revenge on the crook who killed her sister, and has become a recurring character since then.
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As discussed above, the BackupTwin trope can also be used in sci-fi settings with a clone, an identical alternate self of a character from an AlternateUniverse or a near-past twin/future self from the past/future.

* In ''VisualNovel/HigurashiWhenTheyCry'' at the end of ''Watanagashi-hen'', it's clear that Shion and Mion's TwinSwitch tactic was used for this purpose. The question is why and how, and you'll be wracking your brain for the answers until ''Meakashi-hen'' turns the problem on its head. Just to confuse things, the actual evidence towards a BackupTwin effect, one of the twins surviving long enough to kill Keiichi in the hospital, turned out to be [[spoiler:100% dying hallucination on Keiichi's part]]. In reality, [[spoiler: both twins were dead by that point, but not in the order expected.]]

* Neil Dylandy a.k.a Lockon Stratos was killed by the end of ''Anime/MobileSuitGundam00'' but came back for the second season as his twin brother Lyle Dylandy a.k.a Lockon Stratos II. In this case [[ChekhovsGunman the twin's existence was revealed in a brief scene]] early in the series, and later on it veers into DeconstructedTrope. The first thing Lyle made sure to tell his teammates in Celestial Being is he's ''not'' his older twin Neil's ReplacementGoldfish, even preferring to put on a facade of a jerk rather than leading Feldt on, since she was in love with his deceased brother. He also prefers to use a different style of gun fighting to contrast Neil's sniping method, although he also uses it frequently. Basically, both twins are Lockon Stratos, but they are at the same time their very own persons with different views on life, love, and revenge.
* Presea in ''Manga/MagicKnightRayearth'' was replaced by her twin sister Sierra thanks to SchrodingersCast--Presea only died in the anime adaptation, and the plot of Part II needed her. For extra points, Sierra is forced to pretend that she ''is'' Presea thanks to a lie Clef concocted about Emeraude resurrecting her with her last wish.
* Takashi Shirogane (Sven) was killed in the sixth episode of ''Anime/GoLion'' (but merely "wounded" in ''Anime/{{Voltron}}''), but when the audience demanded he be brought back, they did it in Japan by introducing his identical twin brother. (Since he wasn't actually dead in ''Voltron'', they just called him Sven and said he'd finally recovered.)

* Similarly to the ''Voltron'' example, the fighter pilot Saburo Kato in ''Anime/SpaceBattleshipYamato'' was killed in the second season and replaced with an identical twin -- and ''Star Blazers'' averted the whole issue by censoring the death of "Pete Conroy."
* When Buronson and Hara were commissioned to continue ''Manga/FistOfTheNorthStar'' after they killed off Kenshiro's main rival [[NobleDemon Raoh]], they introduced Raoh's previously-unseen/unmentioned older brother [[CardCarryingVillain Kaioh]] as the main antagonist during the Kingdom of Shura story arc. Kaioh looks exactly like Raoh, only with a full body armor, a Darth Vader-like helmet that conceals most of his face, a more [[CoolHorse demonic looking horse]], and a cross-shaped scar on his face. In the anime, Kaioh was also given purple hair to contrast with Raoh's black hair (in the manga, they were both blond-haired).

* A minor cannon fodder Manga/{{Sekirei}}, Mitsuha, had a twin that showed up much later in Mitsuki. Only difference is that she uses a wire instead of a whip and looks like anime Mitsuha instead of manga Mitsuha. The latter is likely going to be just as much fodder as her twin, though.
* ''Manga/SaintSeiya'':
** Saga was very popular but unfortunately was killed. Luckily he was the Gemini Saint and had a brother, Kanon, who was just as eager to take over the world by impersonating someone he is not [[TheAtoner so he can earn forgiveness for his past sins.]]
** It later becomes a staple in ''Saint Seiya'' spin-offs. Saga and Kanon themselves becomes FountainOfExpies. But the winner, that is the most accurate described as this trope is ''Anime/SaintSeiyaOmega'''s Gemini Integra, since she just appeared as nothing but to replace Paradox and is a pure person at heart, not much backstory revealed.

* ''Franchise/TheDCU'': Inverted with Crimson Fox; the D'Aramis twins, Constance and Vivian, faked the death of Constance. They would take turns, one of them acting as Vivian, running their multi-million dollar perfume company (the character was intended to be sort of a French Franchise/{{Batman}}) while the other would fight crime as the Crimson Fox. It was then played straight when Vivian was actually killed in action, and possibly again when Constance was killed in action, though the new Fox, claiming to be the heiress to the D'Aramis fortune, hasn't been identified beyond that.

* ''Film/ABetterTomorrow'': Mark Gor was killed near the end, but thanks to Mark being insanely popular, Creator/ChowYunFat returned as Mark's twin brother Ken Gor in ''A Better Tomorrow 2''.

* Played for laughs in ''Film/{{Beerfest}}''. After a German spy murders Phil "Landfill" Krundle, his identical twin brother Gil shows up at his funeral. Phil's [[UglyGuyHotWife surprisingly attractive widow]] falls in love with him, Gil takes his place on the team, and asks everyone to call him Landfill. Not only that, it turns out that Phil told Gil ''everything'' about everyone already, and they went so far to lampshade the fact it was like Phil hadn't died in the first place.

* Used in a Japanese martial arts movie. A man is killed off by thugs for being the heir to some rich guy, but unbeknownst to the killers he had a SeparatedAtBirth twin brother. This brother has grown up to be a badass martial artist and won't go down as easy as his brother did.

* In ''Film/{{Avatar}}'' the main character Jake Sully, a Marine, goes to Pandora as a replacement for his scientist twin who was killed by a mugger. It specifically mentions that it was lucky he had a twin because the Avatars required genetic matching since they were a hybrid of the human's and alien DNA.

* Preemptive example (as in, the twin is introduced ''before'' the character death): Data and B-4 in ''Film/StarTrekNemesis''. Data even uploads a complete copy of his memories into B-4.
* After Ralph Dickson is executed for murder that he didn't commit in ''Invisible Ghost'', his twin brother comes to the Kessler household to investigate the truth behind the matter.

* Film/MonsterAGoGo uses this. Since the movie was made from an unfinished attempt several years prior (called ''Terror at Halfday''), the second half of ''Monster A Go-Go'' was mostly filmed with different actors entirely- the originals having moved on in the intervening years. The actor playing Dr. Logan was still available, but had changed his appearance radically in the meantime. The director decided to cast him as the brother of Dr. Logan (the original Dr. Logan having been killed off earlier in the film), conveniently allowing him to have a "new" character who had the exact same name and role as the original.
* The [[Creator/MaryKateAndAshleyOlsen Olsen twins]] comedy ''Film/NewYorkMinute'': Jane (Ashley) isn't there to make her speech while Roxy (Mary-Kate) is there with Jane's notebook. So she tries to do Jane's speech for her (and fails miserably). [[spoiler: Luckily, Jane shows up anyway]].
* Creator/QuentinTarantino intended to direct a spin off ''Film/ReservoirDogs'' and ''Film/PulpFiction'' focusing on the Vega brothers. The brothers couldn't appear in a sequel due to both dying in their movies and Creator/MichaelMadsen and Creator/JohnTravolta were getting too old to play younger versions of the characters in a prequel. Madsen claimed Tarantino suggested they play the Vega Brothers' twins, Tarantino later suggested they'd be older brothers.
* ''Film/TheOldDarkHouse1963'': Immediately after Casper's murder, Tom meets his identical twin brother Jasper, who is also quite similar to Casper in personality.

* Subversion in the Literature/VorkosiganSaga, where Miles's clone-twin Mark refuses to replace him after his death, and purposely gains weight to lessen the resemblance. [[spoiler:And Miles comes back to life before the end of the book anyway.]]
* In ''Literature/ThePowerOfFive'' series, there are two versions of the Five: one set lived ten thousand years ago, and one set in the present day. When one of them is killed, their counterpart is sent through time to replace them and defeat the Old Ones.
** In the original battle against the Old Ones ten thousand years ago, Sapling is killed and replaced with his modern counterpart, Jamie.
** In ''Oblivion'', Matt and Scott both die in the present and have to be replaced by the old Matt and Flint.
* AI Minds in Literature/TheCulture are frequently backed up, especially in the case of warship Minds. ''Look to Windward'' has one recount about how he was restored from a backup only for the original to be found adrift in space later. They both then fought together for the remainder of the war until one of them (unknown as to which) was KilledOffForReal.

* ''Series/StarTrekDeepSpaceNine'': A rather bizarre time-based variation occurs in "Visionary", where an accident results in Chief O'Brien repeatedly getting hurled forward several hours into the future before getting pulled back. Hes able to prevent several deadly incidents, but each jump gives him a high dose of radiation. By the last jump, he has device to control it, but the radiation kills him during an attack that would destroy the station. In order to prevent this, the future O'Brien takes the device and goes into the past.

* ''Series/StarTrekPicard'' introduces Dahj, a biological android “daughter” of ''Series/StarTrekTheNextGeneration''’s Data. She’s promptly killed by Romulan agents. Picard’s failure to save her, as well as Data back in ''Film/StarTrekNemesis'' and a planetful of Romulans (he’s had a rough few decades) means that saving her conveniently identical twin sister Soji (played by the same actress) becomes his driving motivation for the rest of the season.
* Season 1 of ''Series/DarkAngel'' had a one-shot character named Ben. The producers were so impressed by his performance (not surprising, since it was [[Creator/JensenAckles Dean Winchester]]), the following season introduced his identical twin, Alec, who became a major character. Rather well justified, since the characters are super soldiers manufactured on the genetic level, and the heroine actually met a younger clone of herself in the first season. Also not a straight example, since the two characters were quite different from each other, and Ben was definitely a source of [[AngstySurvivingTwin angst]] for Alec despite not having met.
* Happens a lot with the humanoid Cylons in ''Series/BattlestarGalactica2003'', most notably Sharon "Boomer" Valerii and Sharon "Athena" Agathon, though Athena was introduced before Boomer's death and it was later shown that Boomer's death had been very brief.
** Even so, following her "death", Boomer largely disappears from the show and only returns to show how fucked up she's gotten from her whole experience with some MoralEventHorizon breakers. They are different characters with different roles, but only rarely during the series do both characters have equal prominence. Once Boomer downloads away from the fleet, Athena largely steals her importance in the plot.
* In between ''Series/{{Maverick}}'' and ''Series/TheRockfordFiles'', James Garner had a show called ''Nichols'', where he played a turn-of-the-century Western lawman. In the last episode of the first (and only) season, Nichols is murdered and Garner plays his DarkerAndEdgier (but more traditionally heroic) twin brother who solves the case. Had the series been renewed, the twin would have taken over his role.
* ''Series/AlloAllo'':
** Parodied when the Germans "shoot" and "kill" the main character, Rene. In order to keep up the ruse, he has to pretend to be his long-lost identical twin brother, also called Rene. He then has to re-marry his "widowed" wife, because his will left everything he owned to her. That led to some hilarious statements, i.e., ''"I've been his ex ever since he died."''
** Poor [=LeClerc=], who was replaced by a supposed brother following the death of the original actor. The brother developed a case of TheOtherDarrin when ''that'' actor also died...
* In the parody soap opera, ''Mary Hartman, Mary Hartman'', Garth Gimble's wife kills him, and his identical twin brother Barth Gimble moves to Fernwood soon thereafter.
* In ''Series/StargateAtlantis,'' Carson Beckett is brought back as a preexisting but yet-unseen clone with all of Carson's memories up to the point of his creation (despite explicit promises by the writers that it would be the original Carson and not something like this). It's all good, though; Carson still comes back. Originally, they planned for the original to return, and the one who died to have turned out to be a clone. They eventually realized it wouldn't have been realistic for the villain to have created a convincing enough clone in the short time he had, so they switched it up.
* In ''[[Series/{{V 1983}} V: The Series]]'', Martin's brother Philip appeared several episodes after Martin was killed off, and more or less filled Martin's role. Given that the Visitors were alien reptiles disguised as humans, there was no actual reason for Philip to be Martin's twin brother, as opposed to just another Visitor wearing the same human mask as Martin. But he was anyway, just because.

* K-9 Mark III was introduced in the failed ''Series/DoctorWho'' spinoff pilot ''Series/K9AndCompany'' for earlier ''Doctor Who'' companion Sarah Jane Smith. When Sarah Jane returned in the new ''Doctor Who'' series, that K-9 "died" and was replaced by a fourth K-9, who is a recurring character in the newer, more successful Sarah Jane series ''Series/TheSarahJaneAdventures''.
* Played worryingly straight in Creator/BBVProductions' semi-official straight-to-video ''Doctor Who'' spin-off series ''[[Series/BBVProbe P.R.O.B.E.]]''. In the video "The Devil of Winterborne", the character of Barbara Taploe, played by Charmian May, is killed. When they came to do a sequel, "Ghosts of Winterborne", producer Bill Baggs convinced writer Creator/MarkGatiss to make the new headmistress Margaret Wyndham her twin sister, so they could use the actress again. Gatiss has expressed his horror that her first line (inserted without his knowledge) is "No, I'm her twin sister"...at which point everyone carries on as if nothing happened.

* In ''Series/AgentsOfSHIELD'', the team heads to the secret base Providence, run by Eric Koenig. In the very next episode, Eric is murdered by [[TheMole Ward]] and the team is forced to abandon the base while chasing the villains. At the very end of the Season 1 finale, they travel to another previously-unseen secret base, only to be greeted by the equally previously-unseen Billy Koenig who welcomes them to the base in a nearly-identical opening speech. Later episodes introduces two more Koenig brothers named Sam and Thurston, as well as one sister. The series hung a [[{{Lampshade}} lampshade]] on it with characters openly wondering how many Koenig brothers there were, and Billy trolling Trip by implying he was a mass-produced android, in a MythologyGag of the comic version of SHIELD who has a long history of using such androids, called LMD's as an explanation for characters coming back from the dead.
* ''Series/TheLateShowWithStephenColbert'' has "Creator/StephenColbert's identical twin cousin from Philadelphia, Stephen Colbert", whose [[https://www.youtube.com/watch?v=LvkFkzpVYJ4&feature=youtu.be&t=80 incredibly convoluted and contrived backstory]] is used to justify bringing back [[Series/TheColbertReport the Colbert character]] without actually using him. Since [[EnforcedTrope they didn't have much of an alternative]], his backstory is a massive AssPull that's PlayedForLaughs. [[ExecutiveMeddling Blame the lawyers.]]
* The TV serial for Spy Smasher introduces the twin brother in the first episode. 12 episodes in the brother takes Spy Smashers place and falls off a building after being shot.
* To the surprise of many, Peter Malboro, in season three of the French-Canadian show ''Series/LeCoeurASesRaisons'', became the only character in the series to be unfortunate enough to get KilledOffForReal (well, except Doug Montgomery, whose death set the entire series in motion). But fear not, as he had a twin, Peter Malboro! The only difference is that he combed his hair the opposite way and a very slight difference in their first name's pronunciation. This Peter proceeds to fill the exact same role, and engages in a relationship with Peter 1's girlfriend. It is explained that the two Peters never appeared at the same time because they only had one set of clothes. When one was wearing it, the other had to stay home in underwear.
** Since it is a NoFourthWall series, it is lampshaded by Brett.
-->'''Brett''': "I still believe there is a scandalous excess of Peters."
* In season 10 of ''Series/MurdochMysteries'', the recurring character of dilettante hobbyist and UpperClassTwit Roger Newsome (Cyrus Lane) is killed off. The following season introduces his brother Rupert (Cyrus Lake with impressive facial hair). He is also introduced as involved in the Hobby of the Week (cricket), but unlike his brother's amiable foolishness, has a strong line in aristocratic outrage.
* When Niki Sanders died in ''Series/{{Heroes}}'', she was replaced with her identical triplet, Tracy. There was a third triplet called Barbara that might have appeared if the series hadn't been cancelled.
* In ''Series/{{Riverdale}}'' when Cliff Blossom dies at the end of the first season, his long lost twin brother, Claudius shows up at his will reading, causing Cliff's daughter Cheryl to faint.
* In ''Series/TheAvengers1960s'' episode "The Superlative Seven", [[spoiler:Wade]] is impaled by a spear and falls off a balcony during a fight with Steed. However, the twin shows up and fights with Mrs. Peel. TheReveal comes after Mrs. Peel dispatches of the second [[spoiler:Wade]] (the first twin was buried under heavy brush after getting killed).
* The ''Series/{{Arrowverse}}'' has taken enormous advantage of TheMultiverse to bring in AlternateUniverse doppelgangers of characters who have died, but whose actors they love to keep around.
** After Harrison Wells (or the man known as Harrison Wells) died at the end of ''Series/TheFlash2014'' Season 1, it's become a running gag that each season will feature (at a minimum) a new version of Wells from a parallel universe. While their personalities vary wildly, they do tend to all be some variation of TheSmartGuy, and be ''very'' arrogant about that fact.
** After Laurel Lance was killed in ''Series/{{Arrow}}'' Season 4, ''The Flash'' Season 2 brought in an evil, superpowered doppelganger of Laurel as a VillainOfTheWeek. This version of Laurel then became a regular on ''Arrow'' starting in Season 5.
** Leonard Snart (a.k.a. Captain Cold) died near the end of ''Series/LegendsOfTomorrow'' Season 1. At first, ''Legends'' and ''The Flash'' satisfied their need to bring him back through time travel visits (though such encounters always had to end with Snart being dropped back into the past with no knowledge of his upcoming death). But during the ''Series/CrisisOnEarthX'' crossover, a doppelganger of Snart from Earth-X was introduced, and made a few followup appearances on ''Flash'' and ''Legends''. This Snart, however, is a far more traditionally heroic character than the villain-turned-reluctant-antihero we'd gotten to know.
** While Amaya hasn't been officially killed off, she ''was'' last seen being returned to the year 1942, meaning she's most likely dead in the present day, and her place on the Legends has been taken by Charlie, a {{Shapeshifter}} who [[ShapeshifterModeLock got stuck wearing Amaya's form]], and has a ''wildly'' different personality (and accent).
* ''Series/OnceUponATime'': An unusual version occurs in the backstory of [[spoiler: David/Prince Charming]] who, as it turns out, isn't actually [[spoiler: a prince at all. He's actually one of the twin sons of a poor shepherd; the family couldn't feed both sons, so Rumplestiltskin, per his modus operandi, arranged for one of the two to be adopted by a childless king. The royal twin - Prince James - was raised by the tyrannical king to be a selfish, amoral, and cruel PrinceCharmless, only to get himself killed. Since the king had already set up an ArrangedMarriage, he forced David to impersonate his dead twin... just in time to meet Snow White]]. It's not entirely clear how many Storybrooke residents know about this (or if they would care).
* ''Series/{{Gotham}}'' did this with Jerome Valeska in the 4th season, introducing his twin brother Jeremiah, who would take his place for the rest of the series.
* At one point in the ''Series/TheSopranos'' Tony orders a hit on a previously never seen member of the Family, Philly Parisi, and the show's creators liked the actor, Dan Grimaldi, so that they gave him a twin brother, Patsy Parisi, who would become a fairly important member of Tony's crew.
* In ''Series/IZombie'', Scott E. is a recurring character who dies in season 1. A few episodes after his death, the show introduced his twin brother Don E., who would later become the BigBad's second-in-command, and a series regular, played by the same actor, of course.

* In ''Paranoia'' you start off with five clones of your character. Since it's a world where everyone is out to get you (hence the name), you will need them.

* Subverted in ''Franchise/MassEffect''. In the first game, depending on your choices, your squadmate Urdnot Wrex may end up dead. Since he plays an important role in the later two games, if he dies, his role is filled by his brother, Urdnot Wreav. What makes this a subversion is that the two are ''radically'' different - Wrex is far more intelligent and calmer than Wreav, which colors how the krogan fare in the second and third games; under Wrex, they can thrive, while under Wreav they go down the self-destructive path that Wrex so feared. The third game further subverts the idea as Wreav will appear regardless, though not as the Krogan Overlord.
* ''VisualNovel/DanganronpaTriggerHappyHavoc'': In Chapter 1, Monokuma kills Ultimate Fashionista Junko Enoshima by [[ImpaledWithExtremePrejudice launching several spears through her body]]. And then, in Chapter 5, the mysterious 16th student shows up as the victim. It turns out the ''real'' Junko Enoshima is working behind the scenes as the Mastermind; she pulled a TwinSwitch with her twin sister Mukuro Ikusaba (the aforementioned 16th student) who disguised herself as her. Junko then [[SiblingMurder killed her twin sister]] in Chapter 1, and used her body to fake the murder of Chapter 5 in order to frame Kyoko Kirgiri.

* In ''VisualNovel/HigurashiWhenTheyCry'' at the end of ''Watanagashi-hen'', it's clear that Shion and Mion's TwinSwitch tactic was used for this purpose. The question is why and how, and you'll be wracking your brain for the answers until ''Meakashi-hen'' turns the problem on its head. Just to confuse things, the actual evidence towards a BackupTwin effect, one of the twins surviving long enough to kill Keiichi in the hospital, turned out to be [[spoiler:100% dying hallucination on Keiichi's part]]. In reality, [[spoiler: both twins were dead by that point, but not in the order expected.]]
* In Keaton's ending in the original ''VideoGame/AeroFighters'', he gets lost in space from the final boss' last explosion, and you play the second run with his twin brother.

* Invoked by Jim in "WebComic/DarthsAndDroids" when Poe dies in a PIE fighter crash. After his backup character is killed offscreen before he can even join the party, Jim opts to introduce the party to Allan, Poe's twin brother. [[spoiler:It seems Allan's existence was unknown even to Leia, making Poe's status as a First Order double-agent even more of an AmbiguousSituation]].
* In "''WebComic/HeroesOfLesserEarth''", Martin's Elf Rogue Cohort "fleece" has an unlimited number of twin sisters, each named Fleece, and more in love with Martin than the last, who instantly replace the previous one if she's killed... because he wrote that on the back of her character sheet.

* In ''WebVideo/ScottTheWoz'', after the character Wendy's Employee is killed in "Memory Cards", his identical twin brother (named Target Employee) appears in "Speed Dating" and future episodes onwards to take over his role in Scott's friend group.

* In the 1980s ''[[WesternAnimation/TeenageMutantNinjaTurtles1987 Teenage Mutant Ninja Turtles]],'' in a rare exception to StatusQuoIsGod, Baxter Stockman got permanently turned into a fly monster, and stayed that way for the rest of the series. The show did briefly try an AssPull, however, by introducing Baxter's still-human twin brother ''Barney'' Stockman. Perhaps thankfully, Barney only appeared once.

Don't try this in RealLife. In fact this should probably go on the Evil Overlord List, because [[MagicGenetics that's not how genetics works guys]]. Real identical twins can be as different in personality as any other siblings: they just LOOK the same. While they might share some similar preferences (there's a great story told in a lot of parenting books about twin boys that loved cinnamon) or even say similar things: they are two completely different people. One could be straight, and the other gay: one could be a killer, and the other a committed pacifist. They could even eerily manifest personality traits of two very different ancestors leading them to become [[EnemyMine nemeses]].This also applies to clones. Genetics are just the foundation of who we are: you can build two completely different houses on the same foundation.

* Season 1 of ''Series/DarkAngel'' had a one-shot character named Ben. The producers were so impressed by his performance[[note]]Not surprising, since it was [[Creator/JensenAckles Dean Winchester]][[/note]], the following season introduced his identical twin, Alec, who became a major character. Rather well justified, since the characters are super soldiers manufactured on the genetic level, and the heroine actually met a younger clone of herself in the first season. Also not a straight example, since the two characters were quite different from each other, and Ben was definitely a source of [[AngstySurvivingTwin angst]] for Alec despite not having met.

* Season 1 of ''Series/DarkAngel'' had a one-shot character named Ben. The producers were so impressed by his performance[[note]]Not surprising, since it was [[Creator/JensenAckles Dean Winchester]][[/note]], the following season introduced his identical twin, Alec, who became a major character. Rather well justified, since the characters are super soldiers manufactured on the genetic level, and the heroine actually met a younger clone of herself in the first season. Also not a straight example, since the two characters were quite different from each other.

* In the first ''VideoGame/{{Gears of War|1}}'', Anthony Carmine gets shot, and dies. In the sequel, his brother Ben Carmine (who sounds exactly the same and is almost a clone in personality) shows up, makes himself at home as a MauveShirt, and then dies. In the third game, we meet their brother Clay Carmine, [[spoiler:who survives and presumably [[SincerityMode lived a long, full life]].]] [[AllThereInTheManual The fourth brother, Dietrich Carmine, was a civilian who died long before any of his brothers did.]]

* ''Dystopia'' kills off [[TheAce Lyon]], which drives an even bigger wedge into the family than there was before. A year after his death, his parents reveal that they cloned Lyon when he was a baby because of his [[IllBoy health issues]], wanting a perfect match in case of medical necessity. The clone gets moved into the family, though he quickly establishes that he's ''not'' Lyon and won't [[ReplacementGoldfish pretend to be him]], intent on having everyone treat him as his own person called Gabriel.

** [[spoiler:Ciel himself]] is revealed to be this to his older twin brother, [[spoiler: the real Ciel]].

* In "''Webcomic/HeroesOfLesserEarth''", Martin's Elf Rogue Cohort "fleece" has an unlimited number of twin sisters, each named Fleece, and more in love with Martin than the last, who instantly replace the previous one if she's killed... because he wrote that on the back of her character sheet.
* Used very literally in ''Webcomic/StoryMinute''. A woman becomes obsessed with backups after a hard drive crash and marries an identical twin.

* In ''VisualNovel/DanganronpaTriggerHappyHavoc'', [[spoiler:It is revealed at the end of the game that the Junko Enoshima who Monokuma killed in the first chapter was actually the real Junko's twin sister, Mukuro Ikusaba. Junko killed her so that there would be no suspicion about her role as [[BigBad The Mastermind]].]]

* Season 1 of ''Series/DarkAngel'' had a one-shot character named Ben. The producers were so impressed by his performance[[note]]Not surprising, since it was [[Series/{{Supernatural}} Dean Winchester]][[/note]], the following season introduced his identical twin, Alec, who became a major character. Rather well justified, since the characters are super soldiers manufactured on the genetic level, and the heroine actually met a younger clone of herself in the first season. Also not a straight example, since the two characters were quite different from each other.

* PlayedForLaughs in ''WesternAnimation/VoltronLegendaryDefender'' episode "Monsters and Mana" (as a MythologyGag to his ''Anime/GoLion'' counterpart; see above) which featured the characters playing a roleplaying game. [[TheStoic Shiro's]] character was a paladin called Shiro with an elaborate backstory, and he really got into it. His response to Shiro being killed? Bring in Shiro's identical twin, Giro the Paladin, who's here to avenge his brother.

When [[CharacterDeath a beloved character is killed]] and the writers are serious about it, their only option for the sequel is to bring them back as their [[AssPull hitherto-unseen]] identical twin sibling.

** Its later becomes a staple in Saint Seiya spin-offs. Saga and Kanon themselves becomes FountainOfExpies. But the winner, that is the most accurate described as this trope is ''Anime/SaintSeiyaOmega'''s Gemini Integra, since she just appeared as nothing but to replace Paradox and is a pure person at heart, not much backstory revealed.

* Goldie and her sister Wendy in ''ComicBook/SinCity''. Goldie dies in the opening, after having sex with Marv, at the hands of a mysterious killer. Wendy isn't introduced until later when she wants to avenge her sister, and even becomes a surrogate love interest for Marv by the end.
* Minor ''ComicBook/SpiderMan'' villain the Ox from the Enforcers got replaced by his never-before-seen twin brother after dying.
* Inverted with DC's Crimson Fox; the D'Aramis twins, Constance and Vivian, faked the death of Constance. They would take turns, one of them acting as Vivian, running their multi-million dollar perfume company (the character was intended to be sort of a French Franchise/{{Batman}}) while the other would fight crime as the Crimson Fox. It was then played straight when Vivian was actually killed in action, and possibly again when Constance was killed in action, though the new Fox, claiming to be the heiress to the D'Aramis fortune, hasn't been identified beyond that.

* ComicStrip/{{Dilbert}} died early on the strip's run, run over by some deer in their car. [[MakesJustAsMuchSenseInContext Dogbert and his garbageman then cloned him from his trash.]]

* The death of Skyquake on ''WesternAnimation/TransformersPrime'' eventually saw the coming of his twin, Dreadwing. However, the two have different colour schemes, different voices, and slightly different personalities (the latter being somewhat more cunning and shrewd than the other). They retain their unifying trait of UndyingLoyalty to Megatron, though, keeping this trope in effect.